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https://github.com/crhntr/bet
This is an exploration in writing structured Go tests using type parameters.
https://github.com/crhntr/bet
Last synced: about 1 month ago
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This is an exploration in writing structured Go tests using type parameters.
- Host: GitHub
- URL: https://github.com/crhntr/bet
- Owner: crhntr
- License: mit
- Created: 2022-01-29T23:47:01.000Z (almost 3 years ago)
- Default Branch: main
- Last Pushed: 2023-02-01T08:43:09.000Z (almost 2 years ago)
- Last Synced: 2024-06-20T02:10:55.979Z (6 months ago)
- Language: Go
- Homepage:
- Size: 6.84 KB
- Stars: 2
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Behavior Tests
This is an exploration in writing structured Go tests using type parameters.
## Specs
```golang
package bet_test
import (
"testing"
"github.com/crhntr/bet"
)
func TestFloat64(t *testing.T) {
behavior := bet.New[float64](t)
defer behavior.Run()
behavior.Setup(func(t *testing.T) float64 {
return 420
})
behavior.Spec("is high", func(t *testing.T, n float64) {
if n != 420 {
t.Fail()
}
})
behavior.Spec("is not zero", func(t *testing.T, n float64) {
if n == 0 {
t.Fail()
}
})
}
```
## Given / When / Then
```golang
package bet_test
import (
"testing"
"github.com/crhntr/bet"
)
type Set map[string]struct{}
func (s Set) Add(v string) {
s[v] = struct{}{}
}
func (s Set) Contains(v string) bool {
_, ok := s[v]
return ok
}
func (s Set) Length() int {
return len(s)
}
func TestSet(t *testing.T) {
bet.Describe[Set](t, "",
bet.Given("an empty set", func() Set {
return make(Set)
},
bet.When("a value is added", func(t *testing.T, set Set) Set {
t.Cleanup(func() {
// do some clean up here.
})
set.Add("hello")
return set
},
bet.Then(
bet.It("has the field", func(t *testing.T, set Set) {
if !set.Contains("hello") {
t.Fail()
}
}),
bet.It("does not have some other key", hasOtherKey),
bet.It("has a length of 1", lengthIsNot1),
),
),
),
)
}
func hasOtherKey(t *testing.T, set Set) {
if set.Contains("greetings") {
t.Fail()
}
}
func lengthIsNot1(t *testing.T, set Set) {
if set.Length() != 1 {
t.Fail()
}
}
```